Gaming FFIV:A (4/2) help needed please...

[Resident0]

I've just beaten the iron giant CPU and my characters are only lvl 42.

whats a good place to level up? Otherwise Zeromus is going to rape me!

 

[X-Gamer]

The only trick I know for some easy exp is to go to the Cave of Summons in the underworld and fight a Summoner. If you're lucky, that monster will summon Arachne which only use Quake magic (if it summon Thunder Dragon then kill them both and try again). If your entire party have Float then there's no way you can be hurt. Kill Arachne and wait until Summoner brings up another one and repeat the process. Make sure not to kill the Summoner until you think you got enough exp for one battle.
If you think Arachne doesn't give enough exp then the only option left is to fight all those tough monsters in the last dungeon like Behemoth and Zemus's Breath. They gives lot of exp but they're a bit tough at lvl 42.